well...they can't do just 3 seasons
the saban era rangers had something special
all rangers were linked...all the stories went down from MMPR to power rangers in space
how? first 5...then 2 left...then there were 6...tommy became white ranger
soon. Rita and Lord Zedd got kicked out of the moon by the robot army and the rangers became CEO..
soon then. the rangers beat the emperor..when Divatox came over and all 5 rangers gave up their powers to a new generation...
half way there, Zordon left
and at the end. Divatox destroyed the command center, while 4 rangers fled to space
they met Andros, red space ranger. and formed a new team of 5 rangers
then at the end of Power Rangers in space. Zordon sacrifices himself to destroy evil on the universe
thus ending the Saga of power rangers...I see it all as a big story